Quick Answer
The answer is the 'call' table. This table within call_history.db is the correct choice because it is the standard SQLite schema used by Apple’s Phone app since iOS 4, containing columns such as 'duration' (stored in seconds) and 'date' (stored as a Cocoa Core Data timestamp), which directly map to the call duration and timestamp an examiner needs. On the Computer Hacking Forensic Investigator CHFI exam, this question tests your knowledge of iOS file system forensics and the specific database structures that store critical artifacts like call logs; a common trap is confusing the 'call' table with other tables like 'address_book' or 'metadata', which lack these precise columns. Remember that the table name is simply 'call'—think of it as the core table for call records, and the timestamp column is named 'date' (not 'timestamp'), so always check the schema for 'duration' and 'date' to confirm you are in the right table.
This CHFI practice question tests your understanding of mobile and malware forensics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An iOS forensic analyst is examining data from an iCloud backup and finds a file named 'call_history.db'. Which SQLite table within this database is MOST likely to contain the duration and timestamp of each phone call?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
ZCONTACT
Why wrong: ZCONTACT is related to contacts, not call history.
ZOBJECT
Why wrong: ZOBJECT is a table in other SQLite databases like knowledgeC.db, not typically in call_history.db.
call
The 'call' table stores call records including date, duration, and phone number.
ZCALL
Why wrong: ZCALL may appear in some versions but the standard table is 'call'.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
call
In iOS, call history data is stored in the 'call_history.db' SQLite database, and the primary table containing call duration and timestamps is named 'call'. The 'call' table includes columns such as 'duration' (in seconds) and 'date' (as a Cocoa Core Data timestamp). This is the standard schema used by Apple's Phone app since iOS 4.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
ZCONTACT
Why it's wrong here
ZCONTACT is related to contacts, not call history.
ZOBJECT
Why it's wrong here
ZOBJECT is a table in other SQLite databases like knowledgeC.db, not typically in call_history.db.
call
Why this is correct
The 'call' table stores call records including date, duration, and phone number.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
ZCALL
Why it's wrong here
ZCALL may appear in some versions but the standard table is 'call'.
Common exam traps
EC-Council often tests the misconception that iOS uses Core Data entity names with a 'Z' prefix (like ZCALL) for all databases, but the call_history.db uses a simple legacy table named 'call' without the prefix.
Detailed technical explanation
The 'call' table in call_history.db uses a 'date' column stored as a Cocoa Core Data timestamp (seconds since January 1, 2001, 00:00:00 UTC), which must be converted to Unix epoch for analysis. The 'duration' column is stored as an integer representing seconds. In iOS 10+, Apple introduced a new 'CallHistoryDB' with a different schema (e.g., 'ZOBJECT' in some contexts), but the classic 'call' table remains the primary source for older backups and is still the most direct answer for this question.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Mobile and Malware Forensics — This question tests Mobile and Malware Forensics — Read the scenario before looking for a memorised answer..
The correct answer is: call — In iOS, call history data is stored in the 'call_history.db' SQLite database, and the primary table containing call duration and timestamps is named 'call'. The 'call' table includes columns such as 'duration' (in seconds) and 'date' (as a Cocoa Core Data timestamp). This is the standard schema used by Apple's Phone app since iOS 4.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
This CHFI practice question is part of Courseiva's free EC-Council certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CHFI exam.
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